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Temperature-controllable vacuum desorption performance testing system

A test system and desorption technology, applied in the direction of measuring devices, instruments, scientific instruments, etc., to achieve accurate measurement, simple structure, and convenient operation

Inactive Publication Date: 2015-05-06
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the gap in the prior art, the present invention aims to propose a temperature-controllable vacuum desorption performance testing system, which can test the desorption characteristics of the adsorbent at different temperatures and different vacuum degrees, and solves the problem of continuous desorption in a high-temperature vacuum environment. The difficult problem of measuring mass change, the system has simple structure, convenient operation and high precision

Method used

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  • Temperature-controllable vacuum desorption performance testing system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The temperature of the drying box (5) is set to 60° C. through the temperature control panel (8) of the drying box, and then the heater is turned on. After the temperature in the drying box rises from room temperature to 60°C, open the box door and quickly place the 30g sieve (22) and the 30g weight (23) on the quartz balance ( 12) on the left and right hooks, and close the door. Open the switch of the vacuum valve (9) of the drying box, and use the vacuum pump (1) to evacuate the working space in the drying box. When the vacuum degree reaches 0.09mPa, close the vacuum valve (9) and the vacuum pump (1). Record the readings of the quartz balance scale, the vacuum degree and temperature of the drying oven at regular intervals. Due to the fast desorption rate in the initial stage of the experiment, the reading interval was set to 3 minutes. As the experiment progressed, the desorption speed slowed down, and the interval time was extended appropriately. Figure 4 Under ...

Embodiment 2

[0027] Using an experimental method similar to Example 1, set the vacuum degree to 0.09mpa, but set the temperature to 30°C, 60°C, 90°C, 120°C, and 150°C in sequence. The test material is ZSM-5 zeolite molecular sieve, see the test results Figure 5 ,From Figure 5 It can be seen that temperature has an important influence on the desorption process of ZSM-5 zeolite molecular sieve. As the temperature increases, the desorption speed becomes faster and the equilibrium desorption percentage increases.

Embodiment 3

[0029] Using an experimental method similar to Example 1, set the temperature at 60°C, and set the vacuum degree to 0.06mPa, 0.07mPa, 0.08mPa, and 0.09mPa in sequence. The effect of pressure on the desorption rate was investigated. The test material is ZSM-5 zeolite molecular sieve, see the test results Figure 6 ,From Figure 6 It can be seen that the degree of vacuum also has a certain influence on the desorption process of ZSM-5 zeolite molecular sieves. Overall, the greater the degree of vacuum, the better the desorption effect. However, relative to the effect of temperature, the effect of vacuum degree on desorption rate is small.

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Abstract

The invention relates to a temperature-controllable vacuum desorption performance testing system, belonging to the field of adsorption refrigeration; the temperature-controllable vacuum desorption performance testing system comprises a vacuum pump, a drying tower and a drying box which are connected in sequence through a rubber pipe; a drying agent is in the drying tower; the drying box is provided with a high-temperature-resistant metal shell, a vacuum gauge, an air discharging knob, a temperature control panel, a vacuum valve switch, a power supply switch, a box space, and an opening / closing door with double-layer high-temperature-resistant perspective glass; a quartz balance scale suitable for a high-temperature vacuum environment is put in the drying box and is used for continuously measuring the quality change of an adsorbent in a desorption process; and the quartz balance scale comprises a base, a support column, a weighbeam, a left hook, a right hook, a rear cantilever, a front cantilever pointer, a cantilever balancing frame and a dial. A sieve filled with the adsorbent and a corresponding weight are respectively hung on the left and right hooks; the system is capable of effectively controlling temperature and pressure in a desorption environment, and therefore, the desorption process of the absorbent in a vacuum closed environment can be dynamically monitored; and the temperature-controllable vacuum desorption performance testing system is simple in structure, convenient to operate and relatively high in testing precision.

Description

technical field [0001] The invention relates to an adsorbent desorption performance testing system, the main technical feature of which is that it can continuously measure the dynamic desorption characteristics of adsorption materials at a given temperature in a vacuum environment. The invention belongs to the technical field of adsorption refrigeration. Background technique [0002] With the continuous improvement of human living standards, people have higher and higher requirements for environmental comfort, and air conditioners have gradually become a necessary household appliance. However, due to the use of freon refrigerants and the consumption of electric energy in traditional refrigeration and air-conditioning equipment, it has become an important factor leading to current environmental and energy problems. Therefore, it is an important subject of research in the field of refrigeration and air conditioning to develop energy-saving and environment-friendly refrigerati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N5/00
Inventor 苑中显辛凤王文超杜春旭
Owner BEIJING UNIV OF TECH